Pansy Greene, 73, is in the early stages of Alzheimer's. She and her husband, Winston, have been married for 57 years. She says her secret to maintaining a normal life is to stay active and positive. David P. Gilkey/NPR hide caption

itoggle caption David P. Gilkey/NPR

Gilroy Hain's only source of income is the $1,500 a month he receives from Social Security. Ina Jaffe/NPR hide caption

itoggle caption Ina Jaffe/NPR

Gaining a few more years of healthy life would be great for individuals, but expensive for Medicare, researchers say. iStockphoto.com hide caption

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The next bed could cost you a lot if the hospital says you're there on observation. iStockphoto.com hide caption

itoggle caption iStockphoto.com

Hazel Trexler-Campbell throws spray-painted horseshoes during the Senior Games in Cleveland on July 23. Benjamin Morris for NPR hide caption

itoggle caption Benjamin Morris for NPR